Statistics Department Seminar Series: Yen-Chi Chen, Assistant Professor, Department of Statistics, University of Washington
"Pattern Graphs: a Graphical Approach to Nonmonotone Missing Data"
Friday, April 7, 2023
340 West Hall Map
Abstract: We introduce the concept of pattern graphs--directed acyclic graphs representing how response patterns are associated. A pattern graph represents an identifying restriction that is nonparametrically identified/saturated and is often a missing not at random restriction. We introduce a selection model and a pattern mixture model formulation using the pattern graphs and show that they are equivalent. A pattern graph leads to an inverse probability weighting estimator as well as an imputation-based estimator. We also study the semi-parametric efficiency theory and derive a multiply-robust estimator using pattern graphs.
|Event Type:||Workshop / Seminar|
|Source:||Happening @ Michigan from Department of Statistics, Department of Statistics Seminar Series|